After removing the second node from the end, the linked list becomes 1->2->3->5. Note: Given n will always be valid. Try to do this in one pass. 【解答】用一个栈来解决问题,注意特殊情况,即要删掉的节点是 head: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 public class Solution...
精选100 道力扣(LeetCode)上最热门的题目,本篇文章只有 easy 级别的,适合初识算法与数据结构的新手和想要在短时间内高效提升的人。 1.两数之和 leetcode-cn.com/problem 方法一 /** * @param {number[]} nums * @param {number} target * @return {number[]} */ var twoSum = function (nums, targ...
eg1:141. Linked list Cycle Given a linked list, determine if it has a cycle in it. # Definition for singly-linked list.# class ListNode(object):# def __init__(self, x):# self.val = x# self.next = NoneclassSolution(object):defhasCycle(self, head):""" :type head: ListNode :r...
Remove Duplicates from Sorted List 题意: Given a sorted linked list, delete all duplicates such that each element appear only once. For example, Given1->1->2, return1->2. Given1->1->2->3->3, return1->2->3. 思路: 删除链表中的反复项,考察链表操作。 主要是用循环推断当前节点和下一...
Easy java 142 Linked List Cycle II Medium java 708 Insert into a Cyclic Sorted List Medium java 拆分链表 例题:86 Partition List 【medium】 题意:给定一个链表以及一个目标值,把小于该目标值的所有节点都移至链表的前端,大于或等于目标值的节点移至链表的尾端,同时要保持这两部分在原先链表中的相对位...
给你单链表的头节点 head ,请你反转链表,并返回反转后的链表。 示例1: 输入:head = [1,2,3,4,5] 输出:[5,4,3,2,1] 示例2: 输入:head = [1,2] 输出:[2,1] 示例3: 输入:head = [] 输出:[] 提示: 链表中节点的数目范围是 [0, 5000] -5000 <= Node.val <= 5000 进阶:链表可...
Can you solve this real interview question? Remove Linked List Elements - Given the head of a linked list and an integer val, remove all the nodes of the linked list that has Node.val == val, and return the new head. Example 1: [https://assets.leetc
链表类(Linked List): 基础知识:链表如何实现,如何遍历链表。链表可以保证头部尾部插入删除操作都是O(1),查找任意元素位置O(N) 基础题目: Leetcode 206. Reverse Linked List Leetcode 876. Middle of the Linked List 注意:快慢指针和链表反转几乎是所有链表类问题的基础,尤其是反转链表,代码很短,建议直接背熟...
LeetCode题目解答——Easy部分 [Updated on 9/22/2017]如今回头看来,里面很多做法都不是最佳的,有的从复杂度上根本就不是最优解,有的写的太啰嗦,有的则用了一些过于tricky的方法。我没有为了这个再更新,就让它们去吧。 LeetCode最近很火,我以前不太知道有这么一个很方便练习算法的网站,直到大概数周前同事...
Given a non-negative integer represented as non-empty a singly linked list of digits, plus one to the integer. Input: [1,2,3] Output: [1,2,4] idea: the one i can think of is reverse add one and reverse back. so i implemented with this: ...